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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/page_load_metrics/experiments/delay_navigation_throttle
.h" |
| 6 |
| 7 #include <map> |
| 8 #include <memory> |
| 9 #include <string> |
| 10 #include <tuple> |
| 11 #include <utility> |
| 12 |
| 13 #include "base/macros.h" |
| 14 #include "base/memory/ptr_util.h" |
| 15 #include "base/memory/ref_counted.h" |
| 16 #include "base/run_loop.h" |
| 17 #include "base/strings/string_number_conversions.h" |
| 18 #include "base/test/scoped_feature_list.h" |
| 19 #include "base/test/test_mock_time_task_runner.h" |
| 20 #include "base/time/time.h" |
| 21 #include "chrome/test/base/chrome_render_view_host_test_harness.h" |
| 22 #include "components/variations/variations_associated_data.h" |
| 23 #include "content/public/browser/navigation_handle.h" |
| 24 #include "content/public/browser/navigation_throttle.h" |
| 25 #include "net/http/http_util.h" |
| 26 #include "testing/gtest/include/gtest/gtest.h" |
| 27 #include "url/gurl.h" |
| 28 |
| 29 class DelayNavigationThrottleTest : public ChromeRenderViewHostTestHarness {}; |
| 30 |
| 31 TEST_F(DelayNavigationThrottleTest, BasicDelay) { |
| 32 const char kBasicResponseHeaders[] = "HTTP/1.1 200 OK"; |
| 33 base::TimeDelta navigation_delay = base::TimeDelta::FromSeconds(1); |
| 34 GURL url("http://www.example.com/"); |
| 35 |
| 36 scoped_refptr<base::TestMockTimeTaskRunner> mock_time_task_runner( |
| 37 new base::TestMockTimeTaskRunner()); |
| 38 std::unique_ptr<content::NavigationHandle> test_handle = |
| 39 content::NavigationHandle::CreateNavigationHandleForTesting(url, |
| 40 main_rfh()); |
| 41 test_handle->RegisterThrottleForTesting( |
| 42 base::MakeUnique<DelayNavigationThrottle>( |
| 43 test_handle.get(), mock_time_task_runner, navigation_delay)); |
| 44 |
| 45 EXPECT_FALSE(mock_time_task_runner->HasPendingTask()); |
| 46 EXPECT_EQ(content::NavigationThrottle::DEFER, |
| 47 test_handle->CallWillStartRequestForTesting( |
| 48 false /* is_post */, content::Referrer(), |
| 49 false /* has_user_gesture */, ui::PAGE_TRANSITION_LINK, |
| 50 false /* is_external_protocol */)); |
| 51 |
| 52 // There may be other throttles that DEFER and post async tasks to the UI |
| 53 // thread. Allow them to run to completion, so our throttle is guaranteed to |
| 54 // have a chance to run. |
| 55 base::RunLoop().RunUntilIdle(); |
| 56 |
| 57 EXPECT_TRUE(mock_time_task_runner->HasPendingTask()); |
| 58 EXPECT_FALSE(test_handle->HasCommitted()); |
| 59 |
| 60 mock_time_task_runner->FastForwardBy(navigation_delay); |
| 61 EXPECT_FALSE(mock_time_task_runner->HasPendingTask()); |
| 62 |
| 63 // Run any remaining async tasks, to make sure all other deferred throttles |
| 64 // can complete. |
| 65 base::RunLoop().RunUntilIdle(); |
| 66 |
| 67 // Verify that the WillSendRequest portion of the navigation has completed, |
| 68 // and NavigationHandle::WillProcessResponse and the commit portion of the |
| 69 // navigation lifetime can now be invoked. |
| 70 EXPECT_EQ(content::NavigationThrottle::PROCEED, |
| 71 test_handle->CallWillProcessResponseForTesting( |
| 72 main_rfh(), |
| 73 net::HttpUtil::AssembleRawHeaders( |
| 74 kBasicResponseHeaders, strlen(kBasicResponseHeaders)))); |
| 75 test_handle->CallDidCommitNavigationForTesting(url); |
| 76 EXPECT_TRUE(test_handle->HasCommitted()); |
| 77 } |
| 78 |
| 79 enum ExpectInstantiationResult { |
| 80 EXPECT_INSTANTIATION, |
| 81 EXPECT_NO_INSTANTIATION |
| 82 }; |
| 83 |
| 84 class DelayNavigationThrottleInstantiationTest |
| 85 : public ChromeRenderViewHostTestHarness, |
| 86 public testing::WithParamInterface< |
| 87 std::tuple<ExpectInstantiationResult, |
| 88 base::FeatureList::OverrideState, |
| 89 base::TimeDelta, |
| 90 bool, |
| 91 double, |
| 92 GURL>> { |
| 93 public: |
| 94 DelayNavigationThrottleInstantiationTest() |
| 95 : field_trial_list_(nullptr /* entropy_provider */) {} |
| 96 |
| 97 void SetUp() override { |
| 98 ChromeRenderViewHostTestHarness::SetUp(); |
| 99 |
| 100 std::tie(expected_instantiation_result_, feature_state_, param_delay_, |
| 101 param_randomize_delay_, param_probability_, url_) = GetParam(); |
| 102 |
| 103 std::map<std::string, std::string> variation_params( |
| 104 {{DelayNavigationThrottle::kParamDelayNavigationDurationMillis, |
| 105 base::IntToString(param_delay_.InMilliseconds())}, |
| 106 {DelayNavigationThrottle::kParamDelayNavigationRandomize, |
| 107 param_randomize_delay_ ? "true" : "false"}, |
| 108 {DelayNavigationThrottle::kParamDelayNavigationProbability, |
| 109 base::DoubleToString(param_probability_)}}); |
| 110 InitializeScopedFeatureList(feature_state_, variation_params); |
| 111 } |
| 112 |
| 113 void TearDown() override { |
| 114 ChromeRenderViewHostTestHarness::TearDown(); |
| 115 variations::testing::ClearAllVariationParams(); |
| 116 } |
| 117 |
| 118 void InitializeScopedFeatureList( |
| 119 base::FeatureList::OverrideState feature_state, |
| 120 const std::map<std::string, std::string>& variation_params) { |
| 121 static const char kTestFieldTrialName[] = "TestTrial"; |
| 122 static const char kTestExperimentGroupName[] = "TestGroup"; |
| 123 |
| 124 EXPECT_TRUE(variations::AssociateVariationParams( |
| 125 kTestFieldTrialName, kTestExperimentGroupName, variation_params)); |
| 126 |
| 127 base::FieldTrial* field_trial = base::FieldTrialList::CreateFieldTrial( |
| 128 kTestFieldTrialName, kTestExperimentGroupName); |
| 129 |
| 130 std::unique_ptr<base::FeatureList> feature_list(new base::FeatureList); |
| 131 feature_list->RegisterFieldTrialOverride(kDelayNavigationFeature.name, |
| 132 feature_state, field_trial); |
| 133 |
| 134 // Since we are adding a scoped feature list after browser start, copy over |
| 135 // the existing feature list to prevent inconsistency. |
| 136 base::FeatureList* existing_feature_list = base::FeatureList::GetInstance(); |
| 137 if (existing_feature_list) { |
| 138 std::string enabled_features; |
| 139 std::string disabled_features; |
| 140 base::FeatureList::GetInstance()->GetFeatureOverrides(&enabled_features, |
| 141 &disabled_features); |
| 142 feature_list->InitializeFromCommandLine(enabled_features, |
| 143 disabled_features); |
| 144 } |
| 145 |
| 146 scoped_feature_list_.InitWithFeatureList(std::move(feature_list)); |
| 147 } |
| 148 |
| 149 base::FieldTrialList field_trial_list_; |
| 150 base::test::ScopedFeatureList scoped_feature_list_; |
| 151 |
| 152 // Fields filled in via GetParam(): |
| 153 base::FeatureList::OverrideState feature_state_; |
| 154 base::TimeDelta param_delay_; |
| 155 bool param_randomize_delay_ = false; |
| 156 double param_probability_ = 0; |
| 157 GURL url_; |
| 158 ExpectInstantiationResult expected_instantiation_result_; |
| 159 |
| 160 private: |
| 161 DISALLOW_COPY_AND_ASSIGN(DelayNavigationThrottleInstantiationTest); |
| 162 }; |
| 163 |
| 164 TEST_P(DelayNavigationThrottleInstantiationTest, Instantiate) { |
| 165 std::unique_ptr<content::NavigationHandle> test_handle = |
| 166 content::NavigationHandle::CreateNavigationHandleForTesting(url_, |
| 167 main_rfh()); |
| 168 std::unique_ptr<DelayNavigationThrottle> throttle = |
| 169 DelayNavigationThrottle::MaybeCreateThrottleFor(test_handle.get()); |
| 170 const bool expect_instantiation = |
| 171 expected_instantiation_result_ == EXPECT_INSTANTIATION; |
| 172 EXPECT_EQ(expect_instantiation, throttle != nullptr); |
| 173 if (throttle) { |
| 174 base::TimeDelta delay = throttle->navigation_delay(); |
| 175 EXPECT_FALSE(delay.is_zero()); |
| 176 EXPECT_GE(param_delay_, delay); |
| 177 } |
| 178 } |
| 179 |
| 180 INSTANTIATE_TEST_CASE_P( |
| 181 InstantiateThrottle, |
| 182 DelayNavigationThrottleInstantiationTest, |
| 183 ::testing::Values( |
| 184 std::make_tuple(EXPECT_NO_INSTANTIATION, |
| 185 base::FeatureList::OVERRIDE_DISABLE_FEATURE, |
| 186 base::TimeDelta::FromMilliseconds(10), |
| 187 false /* randomize delay */, |
| 188 1.0 /* delay probability */, |
| 189 GURL("http://www.example.com/")), |
| 190 std::make_tuple(EXPECT_NO_INSTANTIATION, |
| 191 base::FeatureList::OVERRIDE_ENABLE_FEATURE, |
| 192 base::TimeDelta::FromMilliseconds(10), |
| 193 false /* randomize delay */, |
| 194 1.0 /* delay probability */, |
| 195 GURL("chrome://version")), |
| 196 std::make_tuple(EXPECT_NO_INSTANTIATION, |
| 197 base::FeatureList::OVERRIDE_ENABLE_FEATURE, |
| 198 base::TimeDelta::FromMilliseconds(10), |
| 199 false /* randomize delay */, |
| 200 0.0 /* delay probability */, |
| 201 GURL("http://www.example.com/")), |
| 202 std::make_tuple(EXPECT_INSTANTIATION, |
| 203 base::FeatureList::OVERRIDE_ENABLE_FEATURE, |
| 204 base::TimeDelta::FromMilliseconds(10), |
| 205 false /* randomize delay */, |
| 206 1.0 /* delay probability */, |
| 207 GURL("http://www.example.com/")), |
| 208 std::make_tuple(EXPECT_INSTANTIATION, |
| 209 base::FeatureList::OVERRIDE_ENABLE_FEATURE, |
| 210 base::TimeDelta::FromMilliseconds(10), |
| 211 true /* randomize delay */, |
| 212 1.0 /* delay probability */, |
| 213 GURL("http://www.example.com/")))); |
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